Petryshyn M. Methods and devices of rapid additive and subtractively-additive bitwise analog-digital conversion

In the dissertation work solved the urgent task of increasing the transformation speed of technological parameters through the development the methods and devices of the additive and subtractive-additive bitwise analog-digital conversion. Proposed a model that takes into account the specificity of statistical data distribution. For the first time mathematical methods and models of additive and subtractive-additive analog- digital conversion processes are proposed, the peculiarity of these models is that they represent the balancing process, which starts in the order of the lower grades of digits and the formation of the sign of the completion of the conversion process. The graphical method for analysis the algorithms complexity in the form of vector-branched diagrams (VBD) is proposed, VBD for the given methods is constructed. It is proposed to use the method of controlling the occurrence of adjacent boundaries of each of ± 1 quanta of conversion. The VBD, which implements this principle for the proposed methods of analog- digital conversion, is presented. A software tool was developed that allows to obtains the quantitative parameters of conversion methods. The simulation results of the analog- digital processes of the proposed methods are analyzed and comparison of their effectiveness are made. Structural schemes of successive approximation ADCs have been developed on the basis of the proposed additive and subtractive-additive conversion methods. The hardware implementation of the additive ADC is realized. A system of bidirectional accelerated analog- digital conversion is developed, the purpose of which is to measure technological parameters that change in the specified ranges.